空间目标红外辐射测量系统标定技术

Calibration technology of infrared radiation measurement for space object

为实现对空间目标红外辐射进行定量测量,需要解决红外辐射测量系统的标定问题。针对常规标定方法对大口径红外辐射测量系统标定存在的不足,在对其测量原理分析的基础上,提出了一种内置黑体标定与天文恒星标定相结合的新方法。采用内置黑体作为标准辐射源对匹配镜组和探测器进行标定,采用恒星标准辐射源对大口径主光学系统透过率进行标定,并推导出了红外辐射测量系统整体的响应关系。试验验证表明,该方法与传统的全孔径标定方法相比,曲线斜率误差在4%以内,具有操作简单易行、标定系统的研制难度低、标定效率高等优点。

To realize the quantitative measurement of space target infrared radiation, infrared radiation measurement system must be calibrated in advance. Based on the deficiencies of conventional calibration method for large aperture infrared radiation measurement system, through analysis of calibration and measurement working principle of space object infrared radiation measurement system, a new calibration method was proposed which combined inner blackbody calibration and astronomical star calibration. Respond relation between matching mirror and detector was deduced when using inner blackbody as standard radiation source. Besides, calibration relation between infrared star radiation and transmittance of large-aperture primary mirror system was also deduced when using infrared star as standard radiation source. Then response relation of infrared measurement system was also advanced. The experiments show that the curve slope accuracy of new method is within 4% compared with traditional full-aperture blackbody calibration method. This new method reduces manufacture difficulty of calibration system, has advantages of easy operation, high efficiency of calibration etc.